Who owns ATEN?
Institutional ownership of A10 Networks Inc. from Form 13F, Q2 2026
310 institutional managers reported holding A10 Networks Inc. (ATEN) in Form 13F filings for Q2 2026, with 76,503,955 shares worth $2.9B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 4,346,472 shares (+6.0%). 77 opened new positions and 29 sold out.
- Funds holding
- 310
- Value held
- $2.9B
- New / sold out
- 77 / 29
- Net shares, same filers
- +6.0%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of ATEN
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| BlackRock, Inc. | $507M | 17.7% | 13,568,496 | Added |
| Vanguard Portfolio Management LLC | $129M | 4.5% | 3,462,058 | Added |
| First Trust Advisors LP | $121M | 4.2% | 3,244,739 | Added |
| State Street Corp | $115M | 4.0% | 3,082,631 | Trimmed |
| Vanguard Capital Management LLC | $115M | 4.0% | 3,071,071 | Trimmed |
| Penserra Capital Management LLC | $115M | 4.0% | 3,068,045 | Trimmed |
| Boston Trust Walden Corp | $90.3M | 3.2% | 2,416,808 | Added |
| Wellington Management Group LLP | $73.2M | 2.6% | 1,959,853 | Trimmed |
| Geode Capital Management, LLC | $67.8M | 2.4% | 1,813,638 | Added |
| Goldman Sachs Group Inc | $66.7M | 2.3% | 1,784,946 | Added |
| Dimensional Fund Advisors LP | $59.7M | 2.1% | 1,599,129 | Trimmed |
| Renaissance Technologies LLC | $56.8M | 2.0% | 1,520,287 | Trimmed |
| Arrowstreet Capital, Limited Partnership | $53.7M | 1.9% | 1,437,650 | Trimmed |
| FMR LLC | $53.6M | 1.9% | 1,433,878 | Added |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $53.3M | 1.9% | 1,426,608 | Trimmed |
| Invesco Ltd. | $46.4M | 1.6% | 1,243,053 | Added |
| Punch & Associates Investment Management, Inc. | $44.4M | 1.6% | 1,188,747 | Trimmed |
| Two Sigma Investments, LP | $42.0M | 1.5% | 1,124,963 | Trimmed |
| Prudential Financial Inc | $39.2M | 1.4% | 1,048,320 | Added |
| Barclays PLC | $36.0M | 1.3% | 962,382 | Trimmed |
| Morgan Stanley | $33.9M | 1.2% | 908,083 | Added |
| Nomura Asset Management International Inc. | $33.5M | 1.2% | 896,517 | New |
| Price T Rowe Associates Inc | $33.4M | 1.2% | 894,398 | Trimmed |
| Loomis Sayles & Co L P | $33.0M | 1.2% | 884,023 | New |
| Boston Partners | $30.0M | 1.0% | 802,469 | Trimmed |
Share of 13F holdings is each fund's shares as a share of the 76,503,955 ATEN shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- First Trust Advisors LP Added+$57.0M
- FMR LLC Added+$52.5M
- Nomura Asset Management International Inc. New+$33.5M
- Loomis Sayles & Co L P New+$33.0M
- Invesco Ltd. Added+$32.9M
- Goldman Sachs Group Inc Added+$22.3M
- BlackRock, Inc. Added+$17.9M
- Acadian Asset Management LLC New+$17.0M
- Wasatch Advisors LP New+$15.5M
- Ceredex Value Advisors LLC New+$14.5M
Biggest sellers in Q2 2026
- Barclays PLC Trimmed-$34.1M
- Penserra Capital Management LLC Trimmed-$19.7M
- Jane Street Group, LLC Trimmed-$18.8M
- Citadel Advisors LLC Trimmed-$15.7M
- Deprince Race & Zollo Inc Sold out-$13.1M
- Punch & Associates Investment Management, Inc. Trimmed-$10.1M
- Renaissance Technologies LLC Trimmed-$9.9M
- Russell Investments Group, Ltd. Trimmed-$9.5M
- Millennium Management LLC Trimmed-$8.9M
- Royce & Associates LP Trimmed-$8.2M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $466M and sold $274M; 87 added and 99 trimmed.
Schedule 13D and 13G filings on ATEN
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-07-30FIRST TRUST PORTFOLIOS LP SCHEDULE 13G filed by A10 Networks Inc.Schedule 13G
Questions about ATEN ownership
- Who owns ATEN stock?
- 310 institutional investment managers reported ATEN positions in their Form 13F filings for Q2 2026, holding 76,503,955 shares worth $2.9B in total. BlackRock, Inc. reported the largest position.
- Are funds buying or selling ATEN?
- In Q2 2026, 77 managers opened new ATEN positions, 87 added, 99 trimmed and 29 sold out. Managers that filed in both quarters added a net 4,346,472 shares.
- How current is this ATEN institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to ATEN by CUSIP. Options are left out. ATEN news and filings · ATEN insider trades · Top funds